ABSTRACT
This research examines the vertical uplift behavior of a steel truss bridge and investigates the contributing factors. A thermal camera revealed that the temperatures of paint deteriorated areas were higher than those of paint remaining areas. A UAV and a still camera obtained the images of the upper and lower chord members to quantify the ratio of paint deteriorated area. Assumed member temperatures based on the degree of corrosion were input into the Finite Element Method (FEM) model, which confirmed up warping behavior consistent with experimental findings. Consequently, we concluded that paint condition differences influence member temperatures and vertical displacements.
